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  Toshikazu Hasegawa (Ph.D., The University of Tokyo)

  Professor  
 Unit of Cognitive and Behavioral Sciences
 Department of Life Sciences
 School of Arts and Sciences
 The University of Tokyo
 Komaba, Meguro-ku
 Tokyo 153-8902
 Japan

  Mail:  thase(at)darwin.c.u-tokyo.ac.jp
  Phone:  +81-3-5454-6262 (with fax)

  <Research fields>
  - Animal Behavior, Behavioral Ecology,
  - Evolutionary Study of Human Behavior and Psychology

  <Recent research topics>
  - Life history and reproductive strategies in human and chimpanzees
  - Sexual selection and mate choice among the blue peacock
  - Cognitive and ecological study on Asian elephants
  - Behavioral endocrinology among captive chimpanzees
  - Cognitive studies in children with autism

  <Publications>
 -Saito, A., Mikami, A., Hosokawa, T., & Hasegawa, T. (2006) Adovantage of dichromats over trichromats in discrimination of color-camoflaged stimuli in humans. Perceptual and motorskills. 102: 3-12
 -Kutsukake,N. & Hasegawa,T. (2005) Dominance turnover between an alpha and a beta male and dynamics of social   relationships in Japanese macaques. International Journal of Primatology. 26(4): 775-800.
 -Soma, M., Hasegawa, T. & Okanoya, K. (2005) The evolution of song learnimg: A review from a biological perspective. Congnitive Studies, 12(3): 166-176.
 -Kobayashi, T., Hiraki, K. & Hasegawa, T. (2005) Auditory-visual intermodal matching of small numerosities in  6-month-old infants. Developmental Science, 8(5): 409-419.
 -Senju, A., Tojo, Y., Yaguchi, K. & Hasegawa, T. (2005) Deviant gaze processing in children with autism: An ERP study. Neuropsychologia.43: 1297-1306.
 -Senju, A., Hasegawa, T. & Tojo, Y. (2005) Does perceived direct gaze boost detection in adults and children with and without autism? The stare-in-the-crowd effect revisited. Visual Cognition.12(8):1474-1496.
 -Senju, A. & Hasegawa, T. (2005) Direct gaze captures visuospatial attention. Visual Cognition. 12:127-144.
 -Soma, M. & Hasegawa, T. (2004) The effect of social facilitation and social dominance on foraging success of 
  budgerigars in an unfamiliar environment. Behaviour. 141: 1121-1134.
 -Fujisawa-Kutsukake, K., Kutsukake, N., & Hasegawa, T. (2005) Reconciliation pattern after aggression among Japanese preschool children. Aggressive Behavior. 31: 138-152.
 -Kobayashi, T., Hiraki, K., Mugitani, R. & Hasegawa, T. (2004) Baby arithmetic: one object plus one tone. Cognition 91: B23-B34.
 -Senju, A., Tojo, Y., Dairoku, H., & Hasegawa, T. (2004) Reflexive orienting in response to eye gaze and an arrow in children with and without autism. Journal of Child Psychology and Psychiatry. 45(3): 445-458.
 -Saito, A., Mikami, A., Hasegawa, T., Koida, K., Terao, K., Koike, S., Onish, A., Takenaka, O., Teramoto, M., Mori, Y.  
  (2003) Behavioral evidence of color vision deficiency in aprotanomalia chimpanzee. Primates. 44(2): 171-176.
 -Senju, A., Yaguchi, K., Tojo, Y., & Hasegawa, T. (2003) Eye contact does not facilitate response in children with autism. Cognition. 89: B43-B51.
 -Senju, A. & Hasegawa, T. (2003) Is it difficult to look away from other's direct gaze? : An examination using temporal gap effect. Kisoshinrigaku Kenkyu 22, 33-34.
 -Hiraishi K. & Hasegawa T. (2001) Sharing-rule and detection of free-riders in cooperative groups: Evolutionarily important deontic reasoning in the Wason Selection task.Thinking & Reasoning 7(3): 255-294.

 -M. Daly, M. Wilson, C. A. Salmon, M. Hiraiwa-Hasegawa & T. Hasegawa (2001) Siblicide and seniority. Homicide Studies 5(1): 30-45
 -Kajikawa S. & Hasegawa T. (2000) Acoustic variation of pant hoot calls by male chimpanzees: a playback experiment. J. Ethol. 18: 133-139.
 -Buss, D.M., Shackelford, T.K., Kirkpatrick, L.A., Choe, J., Hasegawa, M.,Hasegawa, T., & Bennett, K. (1999). Jealousy and beliefs about infidelity: Tests of competing hypotheses about sex differences in the United States, Korea, and Japan. Personal Relationships. 6:125-150.
 -Mitani, C. J., Hasegawa, T., Gros-Louis, J., Marler, P. and Byrne, B. (1992) Dialects in chimpanzees? Am. J. Primatol. 27: 233-243.
 -Yamamura, N., Hasegawa, T. and Ito, Y. (1990) Why mothers do not resist infanticide: A cost-benefit genetic model. Evolution 44(5): 1346-1357.
 -Hiraiwa-Hasegawa, M. and Hasegawa, T. (1988) A case of offsprong desertion by a female chimpanzee and the
  behavioral changes of the abandoned offspring. Primates 29(3): 319-330.
 -Nishida, T., Hiraiwa-Hasegawa, M. Hasegawa, T. and Takahata, Y. (1985) Group extinction and female transfer in wild chimpanzees in the Mahale National Park, Tanzania. Z. Tierpsychol. 67: 284-301.
 -Takahata, Y. Hasegawa, T. and Nishida, T. (1984) Chimpanzee Predation in the Mahale Mountains from August 1979 to May 1982. Int. J. Primatol. 5(3): 213-233.
 -Hiraiwa-Hasegawa, M., Hasegawa, T. and Nishida, T. (1984) Demographic study of a large-sized unit-group of chimpanzees in the Mahale Mountains, Tanzania: A preliminary report. Primates 25(4): 401-413.
 -Hasegawa, T., Hiraiwa, M., Nishida, T. and Takasaki, H. (1983) New evidence on scavenging behavior in wild chimpanzees. Current Anthrop. 24(2): 231-232.
 -Hasegawa, T. and Hiraiwa-Hasegawa, M. (1983) Opportunistic and restrictive matings among wild chimpanzees in the Mahale Mountains, Tanzania. J. Ethol. 1: 75-85.
 -Hasegawa, T. and Hiraiwa, M. (1980) Social Interactions of orphans observed in a free-ranging troop of Japanese monkeys. Folia Primatol. 33: 129-158.

 <Book Chapters and Conference Proceedings>
 -Sakaguchi, K., Gudberg, K. J. & Hasegawa, T. (2005). Initial interpersonal attracti between mixed-sex dyad and movement synchrony. In: Anolli L, Duncan S, Magnusson M (Eds.), The Hidden Structure of Social Interaction:>From Genomics to Cultural Patterns. Amsterdam: IOS Press. p.108-120.
 -Hiraiwa- Hasegawa M. and Hasegawa T. (1994 ) Infanticide in nonhuman primates: Sexual selection and local resource competition. In: Infanticide and parental care. S. Parmigiani and F. S. vomSaal (eds.) pp.137-154. Harwood Academic pablishers (Chur, Switzerland)
 -Uehara, S., Nishida, T. Hamai, M., Hasegawa, T., Hayaki, H. Huffman, M. A., Kawanaka, K., Kobayashi, S., Mitani, J. C., Takahata, Y., Takasaki, H. and Tsukahara, T. (1992) Characteristics of predation by the chimpanzees in the Mahale Mountains National Park. In: Topics in primatology. T. Nishida et al. (eds.) pp. 143-158. Univ. Tokyo Press (Tokyo).
 -Nishida, T., Hasegawa, T., Hayaki, H. and Takahata, Y. (1992) Meat-sharing as a coalition strategy by an alpha male chimpanzee? In: Topics in primatology. T. Nishida et al. (eds.) pp. 159-174. Univ. Tokyo Press (Tokyo).
 -Hasegawa, T. (1990) Sex differences in ranging patterns. In: The Chimpanzees of the Mahale Mountains. T Nishida (ed.) pp.99-114. Univ. Tokyo Press (Tokyo).
 -Hasegawa, T. (1989) Sexual behavior of immgrant and resident female chimpanzees at Mahale. In: Understanding
chimpanzees. P. Heltne and L. A. Marquardt (eds.) pp. 90-103. Harvard University Press (Cambridge).